Bookmark Finish Line Motion Study

Create a 12-second reference-led video for memes and jokes using [book prop], [comedy tone] and [scene length]. Core visible action: a bookmark ribbon moves exactly one page just before a toy runner reaches it. The intended task is to write an object comedy about a bookmark hired as a race official that keeps moving the finish line one page ahead; keep the joke understandable without text. Use three shots: establish at 0–3 seconds, demonstrate at 3–9 seconds, hold the result at 9–12 seconds. Make the result understandable without sound. Use one consistent set of props; do not add unsupported labels, quantities or transformations.

Confirm required reference images and timing inputs are present before generating. Keep objects, identities, spatial relationships and light direction consistent. Render the clip when video generation is supported; otherwise supply a timed shot list, reference checklist and generation-ready prompt, labeled as a production plan. Do not claim rendered output without an actual file. Check the opening, transition and final frame against the stated counts and geometry.